<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<title>My web site</title>
		<style type="text/css">
			.box1,.box2{
				width: 200px;
				height: 200px;
				background-color: yellow;
			}
			.box1{
				margin-bottom: 50px;
			}
			.box2{
				margin-top: 100px;
			}
		</style>
	</head>
	<body>
		<div class="box1"></div>
		<div class="box2"></div>
	</body>
</html>